<?php

/**
 * @author		Tobias Reich
 * @copyright	2015 by Tobias Reich
 * @description	This file takes a look at your Lychee-configuration and displays all errors it can find.
 */

namespace Diagnostics;

use Mysqli;
use Imagick;
use Lychee\Modules\Settings;
use Lychee\Modules\Database;

$lychee = __DIR__ . '/../../';

require($lychee . 'php/define.php');
require($lychee . 'php/autoload.php');

require($lychee . 'php/helpers/hasPermissions.php');


// Start the session
session_start();

// Set content
header('content-type: text/plain');

// Declare
$error = '';

// Show separator
echo('Diagnostics' . PHP_EOL);
echo('-----------' . PHP_EOL);

// PHP Version
if (floatval(phpversion())<7.1)		$error .= ('Error: Upgrade to PHP 7.1 or higher' . PHP_EOL);

// Extensions
if (!extension_loaded('session'))	$error .= ('Error: PHP session extension not activated' . PHP_EOL);
if (!extension_loaded('exif'))		$error .= ('Error: PHP exif extension not activated' . PHP_EOL);
if (!extension_loaded('mbstring'))	$error .= ('Error: PHP mbstring extension not activated' . PHP_EOL);
if (!extension_loaded('gd'))		$error .= ('Error: PHP gd extension not activated' . PHP_EOL);
if (!extension_loaded('mysqli'))	$error .= ('Error: PHP mysqli extension not activated' . PHP_EOL);
if (!extension_loaded('json'))		$error .= ('Error: PHP json extension not activated' . PHP_EOL);
if (!extension_loaded('zip'))		$error .= ('Error: PHP zip extension not activated' . PHP_EOL);

// Permissions
if (hasPermissions(LYCHEE_UPLOADS_BIG)===false)			$error .= ('Error: \'uploads/big\' is missing or has insufficient read/write privileges.' . PHP_EOL);
if (hasPermissions(LYCHEE_UPLOADS_SMALL)===false)		$error .= ('Error: \'uploads/small\' is missing or has insufficient read/write privileges.' . PHP_EOL);
if (hasPermissions(LYCHEE_UPLOADS_MEDIUM)===false)		$error .= ('Error: \'uploads/medium\' is missing or has insufficient read/write privileges.' . PHP_EOL);
if (hasPermissions(LYCHEE_UPLOADS_THUMB)===false)		$error .= ('Error: \'uploads/thumb\' is missing or has insufficient read/write privileges.' . PHP_EOL);
if (hasPermissions(LYCHEE_UPLOADS_IMPORT)===false)		$error .= ('Error: \'uploads/import\' is missing or has insufficient read/write privileges.' . PHP_EOL);
if (hasPermissions(LYCHEE_UPLOADS)===false)				$error .= ('Error: \'uploads/\' is missing or has insufficient read/write privileges.' . PHP_EOL);
if (hasPermissions(LYCHEE_DATA)===false)				$error .= ('Error: \'data/\' is missing or has insufficient read/write privileges.' . PHP_EOL);
if (hasPermissions(LYCHEE_DIST.'/user.css')===false) {
														$error .= ('Warning: \'dist/user.css\' does not exist or has insufficient read/write privileges.' . PHP_EOL);
		if (hasPermissions(LYCHEE_DIST)===false)			$error .= ('Warning: \'dist/\' has insufficient read/write privileges.' . PHP_EOL);
}
$perms = fileperms(LYCHEE_CONFIG_FILE);
if($perms & 0x0004)										$error .= ('Error: \'data/config.php\' is world readable.' . PHP_EOL);
if($perms & 0x0002)										$error .= ('Error: \'data/config.php\' is world writable.' . PHP_EOL);
if($perms & 0x0001)										$error .= ('Error: \'data/config.php\' is world executable.' . PHP_EOL); // we do not look at the sticky bit.

// About GD
$gdVersion = array('GD Version' => '-');
if (function_exists('gd_info')) {
	$gdVersion = gd_info();
	if (!$gdVersion['JPEG Support'])											$error .= ('Error: PHP gd extension without jpeg support.' . PHP_EOL);
	if (!$gdVersion['PNG Support'])												$error .= ('Error: PHP gd extension without png support.' . PHP_EOL);
	if (!$gdVersion['GIF Read Support'] || !$gdVersion['GIF Create Support'])	$error .= ('Error: PHP gd extension without full gif support.' . PHP_EOL);
}

// Load config
if (!file_exists(LYCHEE_CONFIG_FILE)) exit('Error: Configuration not found. Please install Lychee for additional tests.');
require(LYCHEE_CONFIG_FILE);

// Database
$database = new Mysqli($dbHost, $dbUser, $dbPassword, $dbName);
if (mysqli_connect_errno()!=0) $error .= ('Error: ' . mysqli_connect_errno() . ': ' . mysqli_connect_error() . '' . PHP_EOL);

// Config
if (!isset($dbName)||$dbName==='')	$error .= ('Error: No property for $dbName in config.php' . PHP_EOL);
if (!isset($dbUser)||$dbUser==='')	$error .= ('Error: No property for $dbUser in config.php' . PHP_EOL);
if (!isset($dbPassword))			$error .= ('Error: No property for $dbPassword in config.php' . PHP_EOL);
if (!isset($dbHost)||$dbHost==='')	$error .= ('Error: No property for $dbHost in config.php' . PHP_EOL);

// Load settings
$settings = Settings::get();

// Settings
if (!isset($settings['username'])||$settings['username']=='')					$error .= ('Error: Username empty or not set in database' . PHP_EOL);
if (!isset($settings['password'])||$settings['password']=='')					$error .= ('Error: Password empty or not set in database' . PHP_EOL);
if (!isset($settings['sortingPhotos'])||$settings['sortingPhotos']=='')			$error .= ('Error: Wrong property for sortingPhotos in database' . PHP_EOL);
if (!isset($settings['sortingAlbums'])||$settings['sortingAlbums']=='')			$error .= ('Error: Wrong property for sortingAlbums in database' . PHP_EOL);
if (!isset($settings['plugins']))												$error .= ('Error: No property for plugins in database' . PHP_EOL);
if (!isset($settings['imagick'])||$settings['imagick']=='')						$error .= ('Error: No or wrong property for imagick in database' . PHP_EOL);
if (!isset($settings['identifier'])||$settings['identifier']=='')				$error .= ('Error: No or wrong property for identifier in database' . PHP_EOL);
if (!isset($settings['skipDuplicates'])||$settings['skipDuplicates']=='')		$error .= ('Error: No or wrong property for skipDuplicates in database' . PHP_EOL);
if (!isset($settings['checkForUpdates'])||($settings['checkForUpdates']!='0'&&$settings['checkForUpdates']!='1')) $error .= ('Error: No or wrong property for checkForUpdates in database' . PHP_EOL);

// Check dropboxKey
if (!$settings['dropboxKey']) echo('Warning: Dropbox import not working. No property for dropboxKey.' . PHP_EOL);

// Check php.ini Settings
if (ini_get('max_execution_time')<200&&ini_set('upload_max_filesize', '20M')===false) echo('Warning: You may experience problems when uploading a large amount of photos. Take a look in the FAQ for details.' . PHP_EOL);
if (empty(ini_get('allow_url_fopen'))) echo('Warning: You may experience problems with the Dropbox- and URL-Import. Edit your php.ini and set allow_url_fopen to 1.' . PHP_EOL);

// Check mysql version
if ($database->server_version<50500) echo('Warning: Lychee uses the GBK charset to avoid sql injections on your MySQL version. Please update to MySQL 5.5 or higher to enable UTF-8 support.' . PHP_EOL);

// Check imagick
if (!extension_loaded('imagick')) echo('Warning: Pictures that are rotated lose their metadata! Please install Imagick to avoid that.' . PHP_EOL);
else if (!$settings['imagick']) echo('Warning: Pictures that are rotated lose their metadata! Please enable Imagick in settings to avoid that.' . PHP_EOL);

// Output
if ($error==='')	echo('No critical problems found. Lychee should work without problems!' . PHP_EOL);
else				echo $error;

// Show separator
echo(PHP_EOL . PHP_EOL . 'System Information' . PHP_EOL);
echo('------------------' . PHP_EOL);

// Ensure that user is logged in
if ((isset($_SESSION['login'])&&$_SESSION['login']===true)&&
	(isset($_SESSION['identifier'])&&$_SESSION['identifier']===$settings['identifier'])) {

	// Load json
	$json = file_get_contents(LYCHEE_SRC . 'package.json');
	$json = json_decode($json, true);

	// Load git info
	// Load Git info
	$git_head = @file_get_contents(LYCHEE . '.git/HEAD');
	if ($git_head !== false) {
		$branch = explode("/", $git_head, 3)[2]; //separate out by the "/" in the string
		$git_head = @file_get_contents(sprintf(LYCHEE . '.git/refs/heads/%s', trim($branch)));
	}
	if ($git_head == false) {
		$git_head = 'No git data found. Probably installed from release.' . PHP_EOL;
	}
	else {
		$git_head = substr($git_head, 0, 7).' ('.trim($branch).')' . PHP_EOL;
	}

	// About imagick
	$imagick = extension_loaded('imagick');
	if ($imagick===true)	$imagickVersion = @Imagick::getVersion();
	else					$imagick = '-';
	if (!isset($imagickVersion, $imagickVersion['versionNumber'])||$imagickVersion==='')	$imagickVersion = '-';
	else																					$imagickVersion = $imagickVersion['versionNumber'];

	// Output system information
	if($json['version'] == NULL)
	{
		echo (LYCHEE_SRC . 'package.json not found. Please do: git submodule init ; git submodule update' . PHP_EOL);
	}
	else
	{
	echo('Lychee Version (json):  ' . $json['version'] . PHP_EOL);
	}
	echo('Lychee Version (git):   ' . $git_head);
	echo('DB Version:             ' . $settings['version'] . PHP_EOL);
	echo('System:                 ' . PHP_OS . PHP_EOL);
	echo('PHP Version:            ' . floatval(phpversion()) . PHP_EOL);
	echo('MySQL Version:          ' . $database->server_version . PHP_EOL);
	echo('Imagick:                ' . $imagick . PHP_EOL);
	echo('Imagick Active:         ' . $settings['imagick'] . PHP_EOL);
	echo('Imagick Version:        ' . $imagickVersion . PHP_EOL);
	echo('GD Version:             ' . $gdVersion['GD Version'] . PHP_EOL);
	echo('Plugins:                ' . implode($settings['plugins'], ', ') . PHP_EOL);

	// Show separator
	echo(PHP_EOL . PHP_EOL . 'Config Information' . PHP_EOL);
	echo('------------------' . PHP_EOL);

	unset($settings['username']);
	unset($settings['password']);
	unset($settings['identifier']);
	unset($settings['dropboxKey']);

	// Load settings
	foreach ($settings as $key => $value)
	{
		if(!is_array($value))
			echo(str_pad($key.':', 24).' '.$value . PHP_EOL);
	}

} else {

	// Don't go further if the user is not logged in
	exit('You have to be logged in to see more information.');

}
